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17
votes
2answers
2k views

What prevents the market from assigning value to testnet ETH?

If enough people mine testnet ETH for testing purposes, difficulty will rise along with the cost of generating testnet coins. In some a circumstance why would the value of testnet coins not rise based ...
14
votes
2answers
1k views

Is a fully private blockchain network immutable?

I always hear that immutability is one of the great assets of using blockchains in banks. An auditor can come and look at the list of transactions and it will trust them because blockchains are ...
1
vote
1answer
94 views

I found a useful Ethereum script. How do I run it ELI5?

What's the least painful option to use the Stackexchange Bounty script described here? I'm dreaming of a chrome extension :)
4
votes
1answer
84 views

Presale tokens / Mist / password denied

My question pertains to my mist wallet and some presale tokens that I successfully imported into the wallet. Before importing the presale tokens, I successfully created the wallet, received and sent ...
4
votes
1answer
118 views

Does using contracts require port forwarding?

I'm following the guide for creating a user service as described here. When I place the urlfetcher.py file in ~/.config/pyethapp/contrib directory and restart pyethapp: $ pyethapp run I get the ...
6
votes
2answers
307 views

What are the most important potential attack vectors on oracles?

Specifically, with my question I want to target Oracelize.it as arguably the most "state of the art" oracle service. This specification is done in order to exclude trivial attacks in the potential ...
0
votes
1answer
191 views

Writing scripts for pyethapp

Is it possible to use pyethapp as a python script interpreter so that account management operations and transactions may be automated.
5
votes
2answers
4k views

Port 30303 error in Mist when I run geth with a different datadir

I run geth with the following command. When I try to start Mist I get an error 30303: bind: address already in use. Why and how can I fix it? This is the command I use to run geth: geth --datadir /...
2
votes
2answers
275 views

Is it possible to modify this command to use with the console in Geth?

I use this command because it allows me to sync the Geth blockchain to an external SD card rather than to the internal hard drive: geth --datadir /media/user/sdcard/chaindata --ipcdisable However, ...
20
votes
1answer
10k views

Initialising structs to storage variables

The following code fails to compile with error: Type struct SomeStruct memory is not implicitly convertible to expected type struct SomeStruct storage pointer. contract StructExample { struct ...
2
votes
1answer
147 views

Mix-ide crashes on OS X El Capitan

I freshly installed the entire Ehtereum toolchain on Mac OS X El Capitan. Everything works fine. However, I cannot launch the Mix IDE. It crashes on launch. Do you have any idea how to resolve this ...
1
vote
2answers
75 views

Mix: How do I reference user accounts in JS

In Mix I can JS reference contracts with contracts['name']. How do I reference the user accounts?
1
vote
0answers
67 views

Suggestions on ether wallets for easy use? [duplicate]

Does anyone have any suggestions on ether wallets that provide fast (no syncing required) interface like MyEtherWallet and also easy to navigate for making transactions (without the need to work out ...
2
votes
1answer
557 views

Transfer DAO's from Myetherwallet to Kraken

I'm trying to transfer some DAO's from Myetherwallet.com to Kraken. I've followed instructions to access my funds through Myetherwallet: -Pasted "to" address (already active in Kraken), -Introduced ...
9
votes
2answers
2k views

Who coined the term block-chain?

I'm interested in learning the essence and background of this community and the concepts it is built upon. Beyond who founded Ethereum, who is responsible for coining terms such as block-chain? Why ...
16
votes
2answers
2k views

How do I retrieve the Voted events from TheDAO?

This question was asked by @Pablo Yabo in the comment section of the question How can I view The DAO proposals including the current voting status?.
1
vote
1answer
817 views

Solidity 'real' type and fixed point regimes

I'm sure I read somewhere that Solidity had a fixed point type 'real' of format 32byte.32byte, though the docs say Fixed Point numbers are still to come. Until it's implemented, is there any best ...
1
vote
2answers
61 views

Getting TheDAO proposals by code

I'm using TheDAO Interface to get the proposals like in Etherscan (https://etherscan.io/token/TheDAO#proposals) but I don't get any. My code is like this: var theDAOInterfaceABI = [{ "constant": true,...
17
votes
1answer
3k views

Instrumenting EVM

I need to get all contract internal transactions. To do it, I'll need to instrument Ethereum EVM. My question is: what I should do to get the transaction details? Right now, I'm looking to the code ...
3
votes
1answer
1k views

Cannot mine on Ubuntu 14.04

I've been trying to start mining on an Ubuntu 14.04 machine for two days now but I just can't make it work; there are no error messages or anything but the behaviour is very weird: I've tried mining ...
2
votes
0answers
69 views

Debugging pyethapp

I'm having some trouble debugging pyethapp. I have also asked a question here. I get an error in file console_service.py at line 38 (as of version pyethapp 1.2.2/linux2/py2.7.9): @inputhook_manager....
2
votes
2answers
669 views

Cannot send ETH or DAO via Ethereum Wallet (Mist)

I have DAO and ETH in my Ethereum Wallet. Every time I try to send it, I input my password and press send, and it sits there saying "confirming" for a few minutes. Eventually, it just reverts back to ...
1
vote
1answer
116 views

Where to find the documents matching the dao proposals hash?

In each proposals of the DAO there is a hash that I guess is here for us to check the proposal document matches the submission. But where to find these documents? Any official link where links to each ...
1
vote
0answers
40 views

I want to change the default download location of the chain data to an SD card instead of the internal hard drive. How can I go about it? [duplicate]

I want to change the default download location of the Geth chain data from the internal hard drive and use an SD card instead. How can I go about it? OS: Ubuntu 15.10. The hard drive is kind of ...
0
votes
1answer
365 views

Error installing cpp-ethereum in homebrew

I am getting this error when attempting to install cpp-ethereum in homebrew. Not sure where to begin...please help! /Users/Macbook/projects/ethereum ==> brew install cpp-ethereum ==> Installing ...
11
votes
2answers
1k views

How to wait Oraclize result before running code further?

I'm trying to write a contract, which first asks input from user, then makes Oraclize query and after receiving answer from Oraclize compares user input to Oraclize answer. My problem is, that my ...
5
votes
1answer
985 views

How do I transfer from The DAO to an exchange using Linux and geth from the terminal?

I don't want to use Mist to interact with the DAO. How do I do it from geth instead?
1
vote
2answers
3k views

How to change to private network in etherum wallet?

How can I change to private network in the ethereum wallet. I just got two mainnet and testnet in the wallet. Appreciate your answers
1
vote
0answers
39 views

Is it possible to use the Geth Console and turn off syncing entirely? [duplicate]

Is it possible to use the Geth Console and turn off syncing entirely? If there is a JS command or another way to make the Geth Console turn off syncing entirely while still being able to use the ...
4
votes
1answer
337 views

How to containerize Eris service

Eris is a unique architecture which has taken a very useful advantage of containerizing the data, services - contracts, js, into separate container instances themselves. With the intent of running ...
4
votes
2answers
2k views

How can I view The DAO proposals including the current voting status?

The EtherScan.io website provides a page for The DAO proposals. This page does not provide the current voting status. How can I view The DAO proposals including the current voting status?
2
votes
1answer
128 views

Can I vote more than once on each The DAO proposal?

An individual has stated in The DAO Forum thread Has the voting began that they have been able to vote more than once on a proposal. Can I vote more than once on each The DAO proposal?
5
votes
1answer
120 views

Is there a reason why Ethereum DAPPS would benefit from their own blockchains?

For example even if all of their useful functions will occur on the ETH blockchain, would a separate blockchain simplify the creation of DAPP tokens to trade on centralized exchanges?
1
vote
0answers
30 views

Can Ether be mined directly into a contract? [duplicate]

For example, if I want a contract to automatically split the ether mined into different addresses instead of having a two step process whereby I first get the ether in an address in my wallet and then ...
11
votes
4answers
1k views

“potential rewrite attack” message on Geth

When I was sending Ether using Mist I got the following message on Geth. I0528 18:34:57.312997 core/blockchain.go:959] imported 1 block(s) (0 queued 0 ignored) including 3 txs in 19.344963ms. #...
9
votes
1answer
2k views

How to manually initialise an array in Solidity?

I can't find a way to manually initialize an array. string[] public cool; function constructor() { cool[0] = "one"; } Won't execute, while function constructor(){ cool[cool.length++] = "...
4
votes
1answer
898 views

Can a contract be the owner of another contract and kill it?

How can contract B (created and owned by contract A) verify that contract A invoked the kill method? (Is msg.sender the same for contract A and B or is msg.sender the address of contract A when A ...
3
votes
3answers
1k views

Creating a contract with constructor in ethereumj

contract Calculator{ int result; function Calculator(int initialResult){ result=initialResult; } } If above is the contract source code I have created then how to call Calculator ...
15
votes
3answers
21k views

Solo Vs Pool Mining With A GPU

Currently I'm using 1 r9 380 card with 20 MH. I've only been mining for 3 days straight (72hours). I used the Mining Calculators from Etherscan and Cryptocompare. While these sites calculate it will ...
5
votes
1answer
141 views

How to enable vi mode in geth console? (readline's inputrc not honored)

Does the geth console input prompt use the standard readline library? For apps that do, setting in ~/.inputrc: set editing-mode vi enables vi mode on the command prompt. For example, try $ python ...
5
votes
1answer
97 views

Why do I see some random transactions to “The DAO” in my mist client?

I am curious to know, why I do see some random transactions of "The DAO" in my mist client within my "last transactions" section. I have actually two of them yet: Is it because I watch my Tokens?
4
votes
2answers
1k views

Delete Wallet AND disable Wallet address

How can I delete my Wallet (deleting the Wallet file) AND disable the blockchain address to prevent accidential money to be send and lurking there forever without access for anyone? Thanks
1
vote
1answer
346 views

Storing an address in nested mapping does not work

Why doesn't this work? contract NameRegistry { function NameRegistry() { // names["users"]["stefreak"] = 0x123; } function register(address record, string namespace, string name) returns (...
3
votes
0answers
455 views

Private Ethereum blockchain to implement in-game currency--legit?

I've been toying with the idea to implement a reward system for a game on top of Ethereum. Mostly for self-study because I'm interested in blockchain technology, but also because Ethereum appears to ...
1
vote
0answers
41 views

Can two state-changing transactions be in a single block? [duplicate]

I don't know how Ethereum verifies the atomicity of the state of a contract in the mining process. Say I have a greet-counting contract. If two people call the greet function in (almost) the same ...
2
votes
1answer
63 views

How are ethers in the DAO contract transferred to the project?

If a proposal is approved, how are ethers in the DAO contract transferred to the project? How does the DAO contract work?
3
votes
2answers
421 views

DAO balance in MyEtherWallet differs from balance in EtherScan.io

I was experimenting with my DAO tokens and found out that the balance in Myetherwallet differs from the balance in EtherScan.io - 0x5C8a1cbEF21403B2D708796ea2F050F517393b91. Screenshot showing the ...
2
votes
1answer
1k views

Unable to send DAO in MyEtherWallet due to insufficient gas

I was trying to send 1 DAO from Myetherwallet to another address and wanted to know if it worked. However, I was not able to send due to insufficient funds for gas * price + value. I had 150000 gas ...
3
votes
1answer
153 views

Can I send ether when a contract creates a new contract?

Is it possible to do something like registry = new assetRegistry.value(1 ether)(); ? This is particularly useful when the constructor function of assetRegistry calls the ethereum alarm service,...
3
votes
2answers
1k views

Unable to execute transactions due to out of gas on Ethereum Mist Wallet?

What should one do to resolve the issue "Data can't be executed, so it will use all provided gas." to execute transactions ? Or how to reset the installation of Mist Wallet as I am using testnet for ...

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